Figure 3. Areas under the ROC curves of readers with focused nonenhanced CT. The area under the ROC curve for reader 1 (
) was 0.951 ± 0.025, that for reader 2 (
) was 0.902 ± 0.029, and that for reader 3 (
) was 0.901 ± 0.035. FPF = false-positive fraction, TPF = true-positive fraction.